Surname ทองสุทธิกุล (ทองสุทธิกุล 
, Thongsuthikul) , in the entire world, is a very rare family name. The surname ทองสุทธิกุล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, ทองสุทธิกุล is the forename as well as the last name.